I think we do have an interest in combating states that try to cross borders and steal parts of other people's country.

Since 9/11, there has been a huge leap in people wanting to get personally involved in public service and international affairs.

There is a fair amount of competition, obviously, with ISIL and the terrorist networks around the world, China also posing a different kind of threat to the rules-based order.

My second epiphany came as an intern at the Carnegie Endowment for International Peace. The man I worked for was consumed with what was going on in Bosnia. And the more I knew [about it] the more saddened I was. There were these images of emaciated men behind barbed wire.... It was like, I've got to find a way to do something.

I think the point that we all agree upon is that we have to engage with Russia.

In general, my rule is find out where your heart is, then speak from the heart. People know the difference between that and something scripted.

I was interning in the CBS sports affiliate in Atlanta with Robin Roberts.... I was taking notes on a Braves-Padres game, and on the live feed came footage of these kids protesting and getting crushed during the Tiananmen Square uprising in China in 1989. In that moment I became like a lot of young people in this country today, horrified and inspired but confused as to what I might do.